Another in my list of applications to try out. This one is called Wink, which is described as
... a Tutorial and Presentation creation software, primarily aimed at creating tutorials on how to use software (like a tutor for MS-Word/Excel etc). Using Wink you can capture screenshots, add explanations boxes, buttons, titles etc and generate a highly effective tutorial for your users.
Our company has and does use ViewletBuilder from Qarbon. Wink seems to do what we need, and the price is very attractive (that would be free). I will try to remember to post back once I've used Wink to generate a serious tutorial.